US5334979A - Power controller - Google Patents
Power controller Download PDFInfo
- Publication number
- US5334979A US5334979A US07/938,422 US93842292A US5334979A US 5334979 A US5334979 A US 5334979A US 93842292 A US93842292 A US 93842292A US 5334979 A US5334979 A US 5334979A
- Authority
- US
- United States
- Prior art keywords
- power
- output
- digital
- digital data
- reference voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
- H03G3/3047—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers for intermittent signals, e.g. burst signals
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G7/00—Volume compression or expansion in amplifiers
- H03G7/002—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers
- H03G7/005—Volume compression or expansion in amplifiers in untuned or low-frequency amplifiers, e.g. audio amplifiers using discontinuously variable devices, e.g. switch-operated
Definitions
- the present invention relates to a power controller for mobile radio communication and, more particularly, to a power controller for controlling the RF (radio frequency) power of a an RF power amplifier such as a mobile telephone unit.
- a conventional power controller includes a detector for extracting a part of a RF power output from a power amplifier and detecting the power, a power control unit for comparing the detection voltage with a predetermined reference voltage to control a feedback operation of the RF power output, and a digital/analog converter for generating the reference voltage in response to a digital signal output from an external circuit, thereby setting a target output power at a constant voltage.
- a power controller comprising power amplifying means for amplifying a an RF signal input on the basis of an applied control voltage to output an RF power, detecting means for detecting the RF power from the power amplifying means to output a detection voltage, digital/analog converting means for converting externally input digital data into a reference voltage to output the reference voltage, and power control means for comparing the reference voltage form the digital/analog converting means with the detection voltage from the detecting means to output the control voltage, wherein the power controller having conversion characteristics in which a rate of change in reference voltage corresponding to a change in digital data is set to be low in a high sensitive output region of a feedback system including the power amplifying means, the detecting means, and the power control means and is set to be high in a low sensitive output region.
- FIG. 1 is a block diagram showing a power controller according to an embodiment of the present invention
- FIG. 2A is a graph showing characteristics of a power amplifier of a power controller according to the present invention.
- FIG. 2B is a graph showing characteristics of a digital/analog converter
- FIG. 3A is a graph showing characteristics of a detector of a power controller according to another embodiment of the present invention.
- FIG. 3B is a graph showing characteristics of a digital/analog converter of the power controller according to the embodiments shown in FIG. 3A.
- FIG. 1 shows a power controller according to an embodiment of the present invention.
- the power controller includes an RF signal input terminal 1 for receiving an RF signal, a power amplifier 2 for receiving the RF signal from the RF signal input terminal 1 and amplifying the RF signal on the basis of an applied control voltage Valc to output an RF power Pout, a detector 3 for detecting the RF power Pout from the power amplifier 2 to output a detection voltage Vdet, a digital/analog converter 9 for parallelly receiving digital data 10 consisting of a plurality of bits output from an external controller 11 to output a reference voltage Vref, and a power control unit 8 for comparing the reference voltage Vref from the digital/analog converter 9 with the detection voltage Vdet from the detector 3 to output the control voltage Valc to the power amplifier 2.
- Reference numeral 4 denotes a high-frequency power output terminal; 5, a control voltage input terminal; 6, a detection voltage input terminal; and 7, a reference voltage input terminal.
- the conversion characteristic curve of the digital/analog converter 9 have nonlinearity which is close to the characteristic curve of the RF power Pout with reference to the control voltage Valc in the power amplifier 2.
- FIGS. 2A and 2B show characteristics of the power amplifier and the digital analog converter in the power controller according to the present invention.
- a feedback control operation is performed by the power amplifier 2, the detector 3, and the power control unit 8 in the same manner as in a conventional power controller.
- the power controller of this embodiment is constituted by adding the digital/analog converter 9 having characteristics (to be described later).
- the external controller 11 sets a required value of the RF power Pout as an independent variable of the system.
- the digital/analog converter 9 converts the digital data 10 into the reference voltage Vref on the basis of predetermined conversion characteristics (to be described later) to output it to the power control unit 8.
- FIG. 2A shows characteristics of the RF power Pout with respect to the control voltage Valc in the power amplifier 2.
- FIG. 2B shows characteristics of the reference voltage Vref with respect to the digital data 10 in the digital/analog converter 9.
- an output from the digital/analog converter 9 increases the resolution of each bit as a function of the reference voltage Vref as indicated by RH in FIG. 2B.
- the output from the digital/analog converter 9 decreases the resolution of each bit as a function of the reference voltage Vref as indicated by RL in FIG. 2B.
- the conversion characteristic of the digital/analog converter 9 are set such .that the rate of change in the reference voltage Vref corresponding to the change in digital data is set to be low in the high sensitivity region SH of the power amplifier 2 and is set to be high in the low sensitivity region SL.
- FIGS. 3A and 3B show characteristics of a detector and a digital/analog converter of a power controller according to another embodiment of the present invention.
- FIG. 3A shows characteristics of a high-frequency power Pout passing through a detector 3 as a function of a detection voltage Vdet shown in FIG. 1.
- FIG. 3B shows characteristics of a reference voltage Vref as a function of digital data 10 in a digital/analog converter 9.
- an output from the digital/analog converter 9 increases the resolution of each bit as a function of the reference voltage Vref as indicated by RH in FIG. 3B.
- the output from the digital/analog converter 9 decreases the resolution of each bit as a function of the reference voltage Vref as indicated by RL in FIG. 3B.
- the conversion characteristics of the digital/analog converter 9 are set such that the rate of change in the reference voltage Vref corresponding to the change in digital data is set to be low in the high sensitivity region SH of the detector 3 and is set to be high in the low sensitivity region SL.
- the conversion characteristics of the digital/analog converter 9 is matched with the characteristics of the power amplifier 2 or the detector 3.
- the conversion characteristics of the digital/analog converter 9 are set such that the rate of change in the reference voltage Vref corresponding to the change in digital data is set to be low in the high sensitivity region of a feedback system including a power amplifier 2, the detector 3, and a power control unit 8 and is set to be high in the low sensitivity region SL.
- bits need not consumed exceeding the required number of bits by the digital/analog converter, a desired constant RF power can be advantageously obtained by a small number of bits.
Abstract
Description
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3220507A JPH0563627A (en) | 1991-08-30 | 1991-08-30 | Power control circuit |
JP3-220507 | 1991-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
US5334979A true US5334979A (en) | 1994-08-02 |
Family
ID=16752114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/938,422 Expired - Fee Related US5334979A (en) | 1991-08-30 | 1992-08-31 | Power controller |
Country Status (6)
Country | Link |
---|---|
US (1) | US5334979A (en) |
EP (1) | EP0532203B1 (en) |
JP (1) | JPH0563627A (en) |
AU (1) | AU652468B2 (en) |
CA (1) | CA2076711C (en) |
DE (1) | DE69221231T2 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6396350B2 (en) | 2000-02-09 | 2002-05-28 | Paradigm Wireless Systems, Inc. | Power booster method and apparatus for improving the performance of radio frequency linear power amplifiers |
US6477358B1 (en) * | 1997-01-23 | 2002-11-05 | Robert Bosch Gmbh | Method for controlling power gain |
US6625429B1 (en) * | 1999-07-02 | 2003-09-23 | Nec Corporation | Mobile radio communication apparatus |
US6701135B2 (en) | 1998-06-29 | 2004-03-02 | Nokia Corporation | Power control in a multi-carrier radio transmitter |
US20050146379A1 (en) * | 2004-01-05 | 2005-07-07 | Hiroki Sugiyama | High frequency power amplifier circuit |
US20070046375A1 (en) * | 2005-08-04 | 2007-03-01 | Dibcom | Method and device for automatic gain control with limited jitter |
US20070285172A1 (en) * | 2006-06-08 | 2007-12-13 | Harris Corporation | Fast bias for power amplifier gating in a TDMA application |
US20080204299A1 (en) * | 2007-02-27 | 2008-08-28 | Infineon Technologies Ag | Adc with logarithmic response and methods for controlling rf power levels |
US20090280758A1 (en) * | 2004-12-23 | 2009-11-12 | Freescale Semiconductor, Inc. | Wireless communication unit and power control system thereof |
US20100009642A1 (en) * | 2004-12-23 | 2010-01-14 | Freescale Semiconductor, Inc. | Power control system for a wireless communication unit |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101387893B (en) * | 2008-10-24 | 2010-06-02 | 北京工业大学 | Electrical heating power closed-loop control method |
Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1108370A (en) * | 1966-01-03 | 1968-04-03 | Marconi Co Ltd | An adjustable attenuating arrangement |
US3999181A (en) * | 1973-10-31 | 1976-12-21 | Societe Generale De Constructions Electriques Et Mecaniques (Alsthom) | Non-linear digital-to-analog convertor |
US4363024A (en) * | 1977-11-21 | 1982-12-07 | Brokaw Adrian P | Digital-to-analog converter providing multiplicative and linear functions |
US4476437A (en) * | 1981-03-20 | 1984-10-09 | Hitachi Denshi Kabushiki Kaisha | System for detecting abnormal condition of high frequency output signal in its power level |
EP0135154A2 (en) * | 1983-08-18 | 1985-03-27 | Nec Corporation | Apparatus for controlling transmission output power |
US4546326A (en) * | 1982-02-03 | 1985-10-08 | U.S. Philips Corporation | Fast automatic gain control arrangement |
JPS60244107A (en) * | 1984-05-18 | 1985-12-04 | Nec Corp | Control circuit of high frequency electric power |
GB2238435A (en) * | 1989-11-06 | 1991-05-29 | Mitsubishi Electric Corp | Controlling gain of modulated transmissions |
EP0446073A1 (en) * | 1990-03-09 | 1991-09-11 | Nokia Mobile Phones Ltd. | A method for improving the precision of power regulation in a radio telephone |
US5126686A (en) * | 1989-08-15 | 1992-06-30 | Astec International, Ltd. | RF amplifier system having multiple selectable power output levels |
US5128629A (en) * | 1991-04-22 | 1992-07-07 | Hughes Aircraft Company | Method for controlling the output power of digital cellular telephones |
US5132634A (en) * | 1991-03-25 | 1992-07-21 | Motorola, Inc. | Amplifier circuit with envelope smoothing |
US5159283A (en) * | 1991-08-26 | 1992-10-27 | Motorola, Inc. | Power amplifier |
US5196806A (en) * | 1990-10-19 | 1993-03-23 | Nec Corporation | Output level control circuit for use in rf power amplifier |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60121830A (en) * | 1983-12-06 | 1985-06-29 | Matsushita Electric Ind Co Ltd | Control method of transmission output |
-
1991
- 1991-08-30 JP JP3220507A patent/JPH0563627A/en active Pending
-
1992
- 1992-08-24 CA CA002076711A patent/CA2076711C/en not_active Expired - Fee Related
- 1992-08-27 DE DE69221231T patent/DE69221231T2/en not_active Expired - Fee Related
- 1992-08-27 EP EP92307796A patent/EP0532203B1/en not_active Expired - Lifetime
- 1992-08-28 AU AU21378/92A patent/AU652468B2/en not_active Ceased
- 1992-08-31 US US07/938,422 patent/US5334979A/en not_active Expired - Fee Related
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1108370A (en) * | 1966-01-03 | 1968-04-03 | Marconi Co Ltd | An adjustable attenuating arrangement |
US3999181A (en) * | 1973-10-31 | 1976-12-21 | Societe Generale De Constructions Electriques Et Mecaniques (Alsthom) | Non-linear digital-to-analog convertor |
US4363024A (en) * | 1977-11-21 | 1982-12-07 | Brokaw Adrian P | Digital-to-analog converter providing multiplicative and linear functions |
US4476437A (en) * | 1981-03-20 | 1984-10-09 | Hitachi Denshi Kabushiki Kaisha | System for detecting abnormal condition of high frequency output signal in its power level |
US4546326A (en) * | 1982-02-03 | 1985-10-08 | U.S. Philips Corporation | Fast automatic gain control arrangement |
EP0135154A2 (en) * | 1983-08-18 | 1985-03-27 | Nec Corporation | Apparatus for controlling transmission output power |
JPS60244107A (en) * | 1984-05-18 | 1985-12-04 | Nec Corp | Control circuit of high frequency electric power |
US5126686A (en) * | 1989-08-15 | 1992-06-30 | Astec International, Ltd. | RF amplifier system having multiple selectable power output levels |
GB2238435A (en) * | 1989-11-06 | 1991-05-29 | Mitsubishi Electric Corp | Controlling gain of modulated transmissions |
EP0446073A1 (en) * | 1990-03-09 | 1991-09-11 | Nokia Mobile Phones Ltd. | A method for improving the precision of power regulation in a radio telephone |
US5196806A (en) * | 1990-10-19 | 1993-03-23 | Nec Corporation | Output level control circuit for use in rf power amplifier |
US5132634A (en) * | 1991-03-25 | 1992-07-21 | Motorola, Inc. | Amplifier circuit with envelope smoothing |
US5128629A (en) * | 1991-04-22 | 1992-07-07 | Hughes Aircraft Company | Method for controlling the output power of digital cellular telephones |
US5159283A (en) * | 1991-08-26 | 1992-10-27 | Motorola, Inc. | Power amplifier |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6477358B1 (en) * | 1997-01-23 | 2002-11-05 | Robert Bosch Gmbh | Method for controlling power gain |
US6701135B2 (en) | 1998-06-29 | 2004-03-02 | Nokia Corporation | Power control in a multi-carrier radio transmitter |
US6625429B1 (en) * | 1999-07-02 | 2003-09-23 | Nec Corporation | Mobile radio communication apparatus |
US6396350B2 (en) | 2000-02-09 | 2002-05-28 | Paradigm Wireless Systems, Inc. | Power booster method and apparatus for improving the performance of radio frequency linear power amplifiers |
US7333564B2 (en) * | 2004-01-05 | 2008-02-19 | Renesas Technology Corp. | High frequency power amplifier circuit |
US20050146379A1 (en) * | 2004-01-05 | 2005-07-07 | Hiroki Sugiyama | High frequency power amplifier circuit |
US20100009642A1 (en) * | 2004-12-23 | 2010-01-14 | Freescale Semiconductor, Inc. | Power control system for a wireless communication unit |
US20090280758A1 (en) * | 2004-12-23 | 2009-11-12 | Freescale Semiconductor, Inc. | Wireless communication unit and power control system thereof |
US7991367B2 (en) | 2004-12-23 | 2011-08-02 | Freescale Semiconductor, Inc. | Wireless communication unit and power control system thereof |
US8014737B2 (en) * | 2004-12-23 | 2011-09-06 | Freescale Semiconductor, Inc. | Power control system for a wireless communication unit |
US20070046375A1 (en) * | 2005-08-04 | 2007-03-01 | Dibcom | Method and device for automatic gain control with limited jitter |
US8259877B2 (en) * | 2005-08-04 | 2012-09-04 | Parrot | Method and device for automatic gain control with limited jitter |
US20070285172A1 (en) * | 2006-06-08 | 2007-12-13 | Harris Corporation | Fast bias for power amplifier gating in a TDMA application |
US7439810B2 (en) * | 2006-06-08 | 2008-10-21 | Harris Corporation | Fast bias for power amplifier gating in a TDMA application |
US20080204299A1 (en) * | 2007-02-27 | 2008-08-28 | Infineon Technologies Ag | Adc with logarithmic response and methods for controlling rf power levels |
US7432839B2 (en) * | 2007-02-27 | 2008-10-07 | Infineon Technologies Ag | ADC with logarithmic response and methods for controlling RF power levels |
DE102008008444B4 (en) * | 2007-02-27 | 2015-05-13 | Infineon Technologies Ag | Analog / digital converter |
Also Published As
Publication number | Publication date |
---|---|
AU652468B2 (en) | 1994-08-25 |
JPH0563627A (en) | 1993-03-12 |
DE69221231T2 (en) | 1997-11-27 |
EP0532203A1 (en) | 1993-03-17 |
AU2137892A (en) | 1993-03-04 |
EP0532203B1 (en) | 1997-07-30 |
DE69221231D1 (en) | 1997-09-04 |
CA2076711C (en) | 1997-12-02 |
CA2076711A1 (en) | 1993-03-01 |
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Legal Events
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AS | Assignment |
Owner name: NEC CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HATAKEYAMA, NAOTO;REEL/FRAME:006290/0046 Effective date: 19920921 |
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Year of fee payment: 8 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20060802 |